Wall peeping fixes (#36202)

* Fixes mobs not being able to keep their view inside wall peepholes

* redundant

* now makes this work properly again after removing redundant code

* now this supports multiple peepers

* adjacency check

* don't check adjacency if manually stopping the look through

* readable

---------

Co-authored-by: SECBATON-GRIFFON <kanef9x@protonmail.com>
Co-authored-by: SECBATON-GRIFFON <>

code/game/turfs/simulated/walls.dm

@@ -25,7 +25,7 @@
 	explosion_block = 1
 
 	holomap_draw_override = HOLOMAP_DRAW_FULL
-	var/mob/living/peeper = null
+	var/list/mob/living/peepers
 
 /turf/simulated/wall/initialize()
 	..()
@@ -167,12 +167,17 @@
 			return
 
 	if(bullet_marks)
-		peeper = user
-		peeper.client.perspective = EYE_PERSPECTIVE
-		peeper.client.eye = src
-		peeper.visible_message("<span class='notice'>[peeper] leans in and looks through \the [src].</span>", \
-		"<span class='notice'>You lean in and look through \the [src].</span>")
-		src.add_fingerprint(peeper)
+		if(user in peepers)
+			reset_view(user, FALSE)
+		else
+			if(!peepers)
+				peepers = list()
+			peepers += user
+			user.reset_view(src)
+			user.visible_message("<span class='notice'>[user] leans in and looks through \the [src].</span>", \
+			"<span class='notice'>You lean in and look through \the [src].</span>")
+			user.register_event(/event/moved, src, nameof(src::reset_view()))
+		src.add_fingerprint(user)
 		return ..()
 
 	user.visible_message("<span class='notice'>[user] pushes \the [src].</span>", \
@@ -181,11 +186,20 @@
 	src.add_fingerprint(user)
 	return ..()
 
-/turf/simulated/wall/proc/reset_view()
-	if(!peeper)
-		return
-	peeper.client.eye = peeper.client.mob
-	peeper.client.perspective = MOB_PERSPECTIVE
+/turf/simulated/wall/proc/reset_view(atom/movable/mover, var/adjacency_check = TRUE)
+	var/list/mob/living/mobs2reset
+	if(isliving(mover) && (mover in peepers))
+		if(adjacency_check && Adjacent(mover))
+			return
+		mobs2reset = list(mover)
+	else if(!mover)
+		mobs2reset = peepers.Copy()
+	for(var/mob/living/L in mobs2reset)
+		L.reset_view()
+		L.visible_message("<span class='notice'>[L] stops looking through \the [src].</span>", \
+		"<span class='notice'>You stop looking through \the [src].</span>")
+		L.unregister_event(/event/moved, src, nameof(src::reset_view()))
+		peepers -= L
 
 /turf/simulated/wall/proc/attack_rotting(mob/user as mob)
 	if(istype(src, /turf/simulated/wall/r_wall)) //I wish I didn't have to do typechecks

code/modules/mob/living/living.dm

@@ -749,13 +749,6 @@ Thanks.
 	if(T != loc)
 		handle_hookchain(Dir)
 
-	if(client && client.eye && istype(client.eye,/turf/simulated/wall))
-		var/turf/simulated/wall/W = client.eye
-		if (!Adjacent(W))
-			client.eye = src
-			client.perspective = MOB_PERSPECTIVE
-			W.peeper = null
-
 	if(.)
 		for(var/obj/item/weapon/gun/G in targeted_by) //Handle moving out of the gunner's view.
 			var/mob/living/M = G.loc

code/modules/mob/mob.dm

@@ -907,7 +907,7 @@ Use this proc preferably at the end of an equipment loadout
 		//END HUMAN
 /mob/proc/reset_view(atom/A)
 	if (client)
-		if (istype(A, /atom/movable))
+		if (A)
 			client.perspective = EYE_PERSPECTIVE
 			client.eye = A
 		else
@@ -1843,6 +1843,8 @@ Use this proc preferably at the end of an equipment loadout
 		return 1
 	if(istype(client_eye,/obj/item/projectile/rocket/nikita))
 		return 1
+	if(istype(client_eye,/turf/simulated/wall) && Adjacent(client_eye))
+		return 1
 	return 0
 
 /mob/proc/html_mob_check()